Humidity-Resistant Flexible Perovskite Solar Cells with Over 20% Efficiency

被引：21
作者：
Ren, Ningyu [1 ,2 ,3 ,4 ,5 ,6 ]
Chen, Bingbing [1 ,2 ,3 ,4 ]
Li, Renjie [1 ,2 ,3 ,4 ]
Wang, Pengyang [1 ,2 ,3 ,4 ]
Mazumdar, Sayantan [1 ,2 ,3 ,4 ]
Shi, Biao [1 ,2 ,3 ,4 ]
Zhu, Chengjun [5 ,6 ]
Zhao, Ying [1 ,2 ,3 ,4 ]
Zhang, Xiaodan [1 ,2 ,3 ,4 ]
机构：
[1] Nankai Univ, Renewable Energy Convers & Storage Ctr, Solar Energy Convers Ctr, Inst Photoelect Thin Film Devices & Technol, Tianjin 300350, Peoples R China
[2] Nankai Univ, Key Lab Photoelect Thin Film Devices & Technol Ti, Tianjin 300350, Peoples R China
[3] Nankai Univ, Engn Res Ctr Thin Film Photoelect Technol Minist, Tianjin 300350, Peoples R China
[4] Nankai Univ, Collaborat Innovat Ctr Chem Sci & Engn Tianjin, Tianjin 300072, Peoples R China
[5] Inner Mongolia Univ, Sch Phys Sci & Technol, Key Lab Semicond, Hohhot 010021, Peoples R China
[6] Inner Mongolia Univ, Photovolta Technol Univ Inner Mongolia Autonomous, Hohhot 010021, Peoples R China
来源：
SOLAR RRL | 2021年 / 5卷 / 04期
基金：
中国国家自然科学基金;
关键词：
flexible solar cells; high efficiency; humidity-resistant; perovskites; solar energy;
D O I：
10.1002/solr.202000795
中图分类号：
TE [石油、天然气工业]; TK [能源与动力工程];
学科分类号：
0807 ; 0820 ;
摘要：
Flexible perovskite solar cells (FPSCs) with high efficiency and excellent mechanical flexible properties have attracted enormous interest as a promising photovoltaic technology in recent years. However, the performance or stability of FPSCs is still far inferior to that of conventional glass-based perovskite solar cells (PSCs). Herein, a cross-linking agent called aluminum acetylacetonate (Al(acac)(3)) is introduced as an interface layer between electron transport layer and perovskite absorber. Due to the well-matched energy levels and improved grain size and crystallinity of the perovskite, a champion device with the highest power conversion efficiency (PCE) of 20.87% is achieved on the FPSCs. The device retains about 80% of its initial performance after 1000 h under >50% relative humidity without encapsulation. In addition, attributed to the Al(acac)(3) super bending resistance, more than 91% of the original PCE is retained after 1500 bending cycles. This work proposes the substrate side optimization for improving device efficiency and stability which may provide a novel concept for promoting the development of FPSCs.
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页数：7
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